Process for removing sulfur dioxide from gas

Details Process for removing sulfur dioxide from gas Process for removing sulfur dioxide from gas

1978-09-21

1980-06-03

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423512A, 423551, C01B 1700, C01D 500, C01D 1700

Patent

active

042061873

ABSTRACT:
There is disclosed a process for obtaining purer sodium sulfate from a mixture of solids containing sodium sulfate and sodium sulfite. The process involves contacting an aqueous slurry of the sulfate-sulfite mixture with a sulfur dioxide-containing gas under conditions which solubilize a significant amount of the sulfite as sodium bisulfite dissolved in the liquid aqueous phase. The remaining solid phase contains sodium sulfate of greater purity than in the mixture treated with sulfur dioxide. The mixture of sodium sulfate and sodium sulfite which is purified by the process may be obtained advantageously as a purge material from a process for removing sulfur dioxide from a gas stream.

REFERENCES:
patent: 3653812 (1972-04-01), Schneider et al.
patent: 3971844 (1976-07-01), Schneider

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